a lot of us met and became friends. so basically, if you guys fail the course, you're out of the wedding party. >> pretty much. >> reporter: hours of rope climbing. >> this is going to be a good one. >> reporter: balance challenging. >> whoo! >> reporter: gravity-defying stunts. >> is it a bad thing that you're going to be doing this for your bachelorette party? >> i think it's a good thing. it shows we're working hard. >> it was just a test i needed to pass to see if i can get married. if i can finish this, i'm allowed to get married. >> reporter: bachelorette parties were around. in the scene of "bridesmaids." >> i'll just snowball on top of that. also fight club. female fight club, we grease up and we pull in, surprise, we're going to fight. we beat the [ bleep ] out of her. >> reporter: here at go april, the new bachelorette boom has been a good test. >> it's kind of a good test for the bridal party. >> yeah, with the camaraderie. and they're going to talk about it all the way through the weekend and probably at the